服务监控HystrixDashboard

1、HystrixDashboard概述
2、新建DashBoard模块
3、断路器演示(服务监控hystrixDashboard)

代码仓库地址：gitee仓库链接

1、HystrixDashboard概述

除了隔离依赖服务的调用以外，Hystrix还提供了准实时的调用监控（Hystrix Dashboard），Hystrix会持续地记录所有通过Hystrix发起的请求的执行信息，并以统计报表和图形的形式展示给用户，包括每秒执行多少请求多少成功，多少失败等。Netflix通过hystrix-metrics-event-stream项目实现了对以上指标的监控。Spring Cloud也提供了Hystrix Dashboard的整合，对监控内容转化成可视化界面。

2、新建DashBoard模块

2.1 新建cloud-consumer-hystrix-dashboard9001模块

2.2 pom.xml

<dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

2.3 application.yml

 
server:
  port: 9001

2.4 HystrixDashboardMain9001+新注解@EnableHystrixDashboard

@SpringBootApplication
@EnableHystrixDashboard
public class HystrixDashboardMain9001
{
    public static void main(String[] args)
    {
        SpringApplication.run(HystrixDashboardMain9001.class,args);
    }
}

2.5 所有Provider微服务提供类(8001/8002/8003)都需要监控依赖配置

 <!-- actuator监控信息完善 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

服务提供者都要添加这个依赖

2.6 启动cloud-consumer-hystrix-dashboard9001该微服务后续将监控微服务8001

访问：http://localhost:9001/hystrix

3、断路器演示(服务监控hystrixDashboard)

3.1 修改cloud-provider-hystrix-payment8001

注意:新版本Hystrix需要在主启动类MainAppHystrix8001中指定监控路径

@SpringBootApplication
@EnableEurekaClient //本服务启动后会自动注册进eureka服务中
@EnableCircuitBreaker//对hystrixR熔断机制的支持
public class PaymentHystrixMain8001
{
    public static void main(String[] args)
    {
        SpringApplication.run(PaymentHystrixMain8001.class,args);
    }

    /**
     *此配置是为了服务监控而配置，与服务容错本身无关，springcloud升级后的坑
     *ServletRegistrationBean因为springboot的默认路径不是"/hystrix.stream"，
     *只要在自己的项目里配置上下面的servlet就可以了
     */
    @Bean
    public ServletRegistrationBean getServlet() {
        HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
        ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);
        registrationBean.setLoadOnStartup(1);
        registrationBean.addUrlMappings("/hystrix.stream");
        registrationBean.setName("HystrixMetricsStreamServlet");
        return registrationBean;
    }
}